As the time goes by and the network with more and more virtualised servers and other devices are making that network more complicated, overlay technologies are rising to save the day for network administrators.
Virtual Extensible LAN – VXLAN
is a new encapsulation technology used to run an overlay network on
current Layer 3 communication network. An overlay network is considered
as a practical network that is set up on the top of current layer 2
network. It also considers additional layer 3 technologies to aid
flexible computer architectures. VXLAN will make sure it is very easy for network
engineers to level out the right cloud computing setting while
reasonably separating cloud applications and tenants. A cloud computing
environment is defined as a multitenant, every tenant needs its
separately configured logical network, which in return needs it’s very own network ID or identification.
What the hell that means?
What it this VXLAN doing actually. To
put it simple, VXLAN can create logical network to connect your virtual
machines across different networks. It is enabling us to make a layer 2
network for our VMs on top of our layer 3 network. That’s why VXLAN is a
overlay technology. In “normal” network if you are connecting virtual
machine to get the connection to some other virtual machine on different
subnet, you need to use a layer 3 router to make a connection between
networks. With VXLAN we can utilize VXLAN gateway of some sort to
connect them without even exiting into physical network.
Normally, network engineers have made use of virtual LANs – VLANs to separate applications and tenants in a cloud computing setting but VLAN
requirements just permit or allow for up to 4,096 network
identifications to be allocated at a specific given period – which may
not be adequate addresses for a very big cloud computing setting. The
main goal of VXLAN is to lengthen the VLAN
address space just by including 24-bit sector identification and
maximizing the number of accessible identifications to 16 million. The
virtual extensible LAN
– VXLAN segment identification in every frame makes individual logical
networks stand out which means millions of separated Layer 2 VXLAN
networks that can stay on normal Layer 3 infrastructure.
Just like VLANs,
just virtual machines in the same rational network can commune with one
other. If accepted, VXLAN is capable of potentially permitting network
engineers to transfer virtual devices across extended distances and play
a very vital role in software-defined networking – SDN, an up and
coming structural design that lets servers or controllers tell network
switches exactly where they need to send packets. In conventional
networks, every switch has proprietary program that tells it exactly
what to do. In SDNs, the transfer or packet decisions are consolidated
and the flow of network traffic can be planned separately of all
personal switches and information center equipment.
To put to use software-defined
networking with VXLAN, supervisors can make use of current hardware and
software, this feature helps to make the technology strong and appealing
financially. There are so many vendors who are rolling out VXLAN
gateways because it helps to bridge network services between software
based network overlays and fundamental physical infrastructure. A lot of
vendors have been able to pitch network overlays set on gateway protocols
such as VXLAN or virtual extensible VLAN, as a method to implement
software based, virtualized cloud networking. It is a very amazing,
however network overlays do not restore the physical setting, and they
just abstract it.
The physical network is still available
and it has to be well organized. Also, a lot of network overlays are
organized in hybrid settings where a lot of the information center is
still ruled by legacy architecture and network services, like firewalls
and load balances, are still put into place in hardware. Due to this,
companies will need VXLAN gateway in other to expand services and
administration across both physical and virtual networks. There are
VXLAN gateways available in programs, but hardware support will be
better scaled. VXLAN is mostly the easiest implementation of the
traditional network to virtualization border, got from legacy networking
to complete virtualized networking. So many companies are benefiting
from these networks in running their businesses
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